This is a replacement Suburban Limit switch part # 231244 for NT30 SP30,000 btu models common part good to have a spare on hand this item ships priority mail usually ships same day this service arrives fast to your door in one to three business days. We know you need it fast that is why we stock it our goal is to get you back up and running providing fast shipping and fast service. If you are ordering multiple items please call us as we can usually save you shipping costs.